#### Megh

##### Newbie level 5

**banba bandgap**

Hello,

Designing a sub volt (Banba Type) bandgap.

I am having problem that my low frequency PSRR is say -40dB and then the PSRR rises to -29dB at say 10MHz and then again starts reducing.

Need to improve this peaking in PSRR curve.

Please help on this.

My understanding is:

1) DC PSRR is governed by the loop gain and the Resistor devider ratios.

2) High frequency PSRR basically behaves the way (inverted image) of the gain of your loop.

If this understanding is correct then I don't see a zero (on the gain curve) near the frequency where my PSRR starts going uphill.

Please help on this

Thanks